Wait, here's the problem. The slider need to improve AI pace only, not giving them faster cars. I would race Super GT's against other Super GT's not against F1's! It's like the developers are cheating, not giving faster AI just giving them faster cars. That's plain wrong.
I like the option, personally, but this is a YMMV thing.
Shift 2 is the best "game" out of the three but damn controls.
Well... in your opinion. Shift was a good idea that suffered EA-itis. Maybe Project CARS will be their answer, but we'll have to wait for release to know.
Still, with me growing "comfy" with Forza 4, more or less, maybe I should give Shift 2 another chance as well...
I've never, ever enjoyed an off line 'race' in GT5 (GT5p & GT5 are the only games I've played in the series) and I've haven't been able to get into or stay in an online lobby for months.
Prior to me jumping back in to Forza for a while, I've been racing almost exclusively in GT5 Arcade Mode, where there are no goodies. No XP, credits or prize cars, just a race, and the racing has been a lot of fun. Yes, even with bots that slam on their brakes around turns. I haven't been impressed much with any racing games' bots over any other. How is it any worse than the horror of being caught in a mob in in GTR as they smash their way through a chicane, and crush my car along with them?
we all hope for an improvement in GT6, but all any of us can do is wait and see, the question is will you still buy it and play it if there is not?
Hells yeah!

Seriously, the only other game like it out there is Forza, and I'm just not all that comfortable with the driving model in Forza, so I'm not exactly hot to spend the $800-plus required to jump in to the Leashbox for just one racing game I might not like any better than the one I have now with slightly better graphics.
Like you, I've played a plethora of racing games, but unlike you, I find the PC sim world to be rather dry, lifeless and clinical. It feels like all the cars are loaners, I rarely like any of the liveries, and until now, the graphics were PS2 level in HD. Frankly, I find that the sounds are only marginally better and the bots plain and polite. iRenting sounds intriguing, but as I imply with my pet name for it, I'm not that rich and can't justify the price to race against other humans, some of who make an online career out of it and always leave me in their virtual dust. And I can only take so much F1 racing before I get a headache and the jitters.
And unlike you, I've played Gran Turismo from the beginning, and it has spoiled me with the wealth of cars and tracks, and the essence of the series which to me oozes panache and spirit. To me, and after all, we buy games for our own pleasure. I love tinkering with everything from the latest supercars to what I refer to as dinkmobiles, and seeing how they fare against similarly classed cars. Only two game series really offer that, and one I have issues with.